Codeless GPS positioning method and apparatus for such codeless positioning
US5821898A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 13, 1996 |
| Grant date | Oct 13, 1998 |
| Priority date | — |
| Expiry date | Mar 13, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S5/0036
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a method and an apparatus for codeless GPS positioning. According to the method, the unit (2) to be positioned receives GPS signals from several satellites (4), the codes of the GPS signals are removed, and the extracted carrier signals are transmitted out from the unit (2) to be positioned for the purpose of determining the position and/or velocity of said unit (2) to be positioned. According to the invention, the carrier signal frequencies are detected by means of a phase-locked loop and the thus detected signals are transmitted in digital format out from the unit (2) to be positioned for the purpose of further processing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.